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Finding the Fourth Proportional to 99,354.74, 137,074.70 and 56,327.92

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Solution

The fourth proportional to 99,354.74, 137,074.70 and 56,327.92 is: 77,712.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,354.74 : 137,074.70 = 56,327.92 : x
  2. Step 2: Convert to fraction form
    99,354.74/137,074.70 = 56,327.92/x
  3. Step 3: Cross multiply
    99,354.74x = 137,074.70 × 56,327.92
  4. Step 4: Simplify right side
    99,354.74x = 7,721,132,735.62
  5. Step 5: Solve for x
    x = 7,721,132,735.62/99,354.74
  6. Step 6: Final answer
    x = 77,712.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.